Glassie is in need of some ps brushes...

I need several brushes for my next picture:
You know how light comes out of windows into a dark room? Well, I need some brushes that resemble somewhat a light
show...
Also, some chain brushes
- photoshop 7 perferably, but can be any other version
OR
- a picture where the light is coming out as a refrence for me.
Thanks in advance!